<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>用户管理</el-breadcrumb-item>
            <el-breadcrumb-item>用户列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图区域 -->
        <el-card>
            <!-- 这是搜索与添加区-->
            <!-- el-card卡片视图：其中el-row: gutter="20"表示栅格和列之间的间隔大小
                                el-col: span = '8'表示列和列的宽  -->
                <el-row :gutter="20">
                    <el-col :span = '8'>
                        <el-input placeholder="请输入内容"
                        v-model="queryInfo.query" clearable 
                        @clear = 'getUserList'>
                            <el-button slot="append" 
                            icon="el-icon-search"
                            @click="getUserList"></el-button>
                        </el-input>
                    </el-col>

                    <el-col :span = '4'>
                        <el-button type="primary" 
                        @click="addDialogVisible = true">添加用户</el-button>
                    </el-col>
                </el-row>

                <!-- 用户列表区域 -->
                <el-table :data="userlist" border stripe>
                    <el-table-column type="index" label="#"></el-table-column>
                    <el-table-column label='姓名' prop="username"></el-table-column>
                    <el-table-column label='邮箱' prop="email"></el-table-column>
                    <el-table-column label='电话' prop="mobile"></el-table-column>
                    <el-table-column label='角色' prop="role_name"></el-table-column>


                    <!-- change	switch 状态发生变化时的回调函数	回调参数为新状态的值 -->
                    <el-table-column label='状态' >
                        <template slot-scope="scope">
                            <!-- {{scope.row}} -->
                            <el-switch v-model="scope.row.mg_state"
                            @change="userStateChanged(scope.row)">
                            </el-switch>                                      
                        </template>
                    </el-table-column>
                    <!-- 1.在“状态”栏目定义了template作用域插槽，通过slot-scope 接受了当前作用域的数据
                    2.通过{{scope.row}}拿到对应这一行的数据
                    3.添加el-switch按钮组件，在v-model中绑定具体的属性值  -->

                    <el-table-column label='操作' width="180px">
                        <template slot-scope="scope">
                            <!-- 修改按钮 -->
                            <el-button type="danger" icon="el-icon-edit" size="mini"
                            @click="showEditDialog(scope.row.id)"></el-button>
                            <!-- 删除按钮 -->
                            <el-button type="primary" 
                            icon="el-icon-delete"
                            size="mini"
                            @click="removeUserById(scope.row.id)"
                            ></el-button>
                            <!-- 分配角色按钮 -->
                                <el-tooltip  effect="dark" content="分配角色" placement="top" :enterable='false'>
                                    <el-button type="warning" icon="el-icon-setting" size="mini" 
                                    @click="setRole(scope.row)"></el-button>
                                </el-tooltip>
                        </template>

                    </el-table-column>
                </el-table>

                <!-- 分页区域 -->
                    <el-pagination
                        @size-change="handleSizeChange"
                        @current-change="handleCurrentChange"
                        :current-page="queryInfo.pagenum"
                        :page-sizes="[1,2,5,10]"
                        :page-size="queryInfo.pagesize"
                        layout="total, sizes, prev, pager, next, jumper"
                        :total="total">
                    </el-pagination>
             </el-card>

            <!-- 添加用户的对话框 -->
             <el-dialog
                title="添加新用户"
                :visible.sync="addDialogVisible"
                width="50%"
                @close='addDialogClosed'>
                <!-- 内容主体区域 -->
                <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="70px">

                    <el-form-item label="用户名" prop="username">
                        <el-input v-model="addForm.username"></el-input>
                    </el-form-item>
                    <el-form-item label="密码" prop="password">
                        <el-input v-model="addForm.password"></el-input>
                    </el-form-item>
                    <el-form-item label="邮箱" prop="email">
                        <el-input v-model="addForm.email"></el-input>
                    </el-form-item>
                    <el-form-item label="手机" prop="mobile">
                        <el-input v-model="addForm.mobile"></el-input>
                    </el-form-item>
                    
                </el-form>
                <!-- 底部区域 -->
                <span slot="footer" class="dialog-footer">
                    <el-button @click="addDialogVisible = false">取 消</el-button>
                    <el-button type="primary" @click="addUser">确 定</el-button>
                </span>
            </el-dialog>
            
            <!-- 修改用户的对话框 -->
            <el-dialog
                title="修改用户"
                :visible.sync="editDialogVisible"
                width="50%" >

                <el-form :model="editForm" :rules="editFormRules"
                ref="editFormrRef" label-width="70px" @close="editDialogClosed">

                    <el-form-item label="用户名">
                        <el-input v-model="editForm.username" disabled></el-input>
                    </el-form-item>
                    <el-form-item label="邮箱" prop="email">
                        <el-input v-model="editForm.email"></el-input>
                    </el-form-item>
                    <el-form-item label="手机号" prop="mobile">
                        <el-input v-model="editForm.mobile"></el-input>
                    </el-form-item>
                    
                </el-form>
                <span slot="footer" class="dialog-footer">
                    <el-button @click="editDialogVisible = false">取 消</el-button>
                    <el-button type="primary" @click="editUserInfo">确 定</el-button>
                </span>
            </el-dialog>

            <!-- 分配角色的对话框 -->
            <el-dialog title="分配角色" :visible.sync="setRoleDialogVisible" width="50%" 
            @close ='setRoleDialogClosed'>
                <div>
                    <p>当前的用户：{{userInfo.username}}</p>
                    <p>当前的用户：{{userInfo.role_name}}</p>
                    <p>分配新角色：
                         <el-select v-model="selectedRoleId" placeholder="请选择">
                            <el-option v-for="item in rolesList" :key="item.id"
                            :label="item.roleName" :value="item.id">
                            </el-option>
                        </el-select>
                    </p>
                </div>
                <span slot="footer" class="dialog-footer">
                    <el-button @click="setRoleDialogVisible = false">取 消</el-button>
                    <el-button type="primary" @click="saveRoleInfo">确 定</el-button>
                </span>
            </el-dialog>

    </div>
</template>

<script>
export default {
    data() {
        //验证邮箱的规则
        var checkEmail = (rule,value,cb) => {
            // 验证邮箱的正则表达式
            const regEmail = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-])+/
            if (regEmail.test(value)) {
                // 合法邮箱
                return cb()
            }
            cb(new Error("请输入合法邮箱"))
        }
        //验证手机号的规则
        var checkmobile = (rule,value,cb) => {
            // 验证手机号的正则表达式
            const regMobile = /^(13[0-9]|14[01456879]|15[0-35-9]|16[2567]|17[0-8]|18[0-9]|19[0-35-9])\d{8}$/
            if (regMobile.test(value)) {
                return cb()
            }
            cb(new Error("请输入合法的手机号"))
        }

        return {
            //获取用户列表的参数对象
            queryInfo: {
                query: '',
                //当前的页数 
                pagenum: 1,
                //当前每页显示多少条数据
                pagesize:2
            },
            userlist:[],
            total:0,
            //控制添加用户对话框的显示与隐藏
            addDialogVisible: false,
            //添加对象的表单数据
            addForm: {
                username: '',
                password: '',
                email: '',
                mobile: ''

            },
            //添加表单的验证规则对象
            addFormRules:{
                username:[
                    {required: true, 
                    message:'请输入用户名', trigger:'blur'},// message错误消息；trigger触发验证的时机
                    {
                    min: 3,
                    max: 10,
                    message :"用户名的长度在3~10个字符之间",
                    trigger:'blur'
                    }
                ],
            password: [
                {required: true, 
                    message:'请输入密码', trigger:'blur'},// message错误消息；trigger触发验证的时机
                    {
                    min: 6,
                    max: 15,
                    message :"密码的长度在6~15个字符之间",
                    trigger:'blur'
                }
            ],
            email:[
                {required: true, 
                    message:'请输入邮箱', trigger:'blur'},{validator: checkEmail, trigger:'blur'}
            ],
            mobile: [
                {required: true, 
                    message:'请输入手机', trigger:'blur'},{validator: checkmobile, trigger:'blur'}
            ]
            },
            //控制修改用户对话框的显示与隐藏
            editDialogVisible: false,
            //查询到的用户信息对象
            editForm:{},
            //修改表单的验证规则对象
            editFormRules: {
                email: [
                    {required: true, 
                    message:'请输入用户邮箱', trigger:'blur'},
                    {validator: checkEmail, trigger:'blur'}
                ],
                mobile: [
                    {required: true, 
                    message:'请输入用户手机', trigger:'blur'},
                    {validator: checkmobile, trigger:'blur'}
                ],
            },
            // 控制分配角色对话框的显示与隐藏
            setRoleDialogVisible: false,
            //需要被分配角色的用户信息
            userInfo: {},
            //所有角色的数据列表
            rolesList: [],
            // 已选中的角色Id值
            selectedRoleId:''
        }
    },
    created() {
        this.getUserList()
    },
    methods: {
        async getUserList() {
            const {data:res} = await this.$http.get('users', { params: this.queryInfo
            })
            if(res.meta.status !== 200) {
                return this.$message.error('获取用户列表失败！')
            }
            this.userlist = res.data.users
            this.total = res.data.total
            console.log(res)
        },
        // 监听 pagesize 改变的事件
        handleSizeChange(newSize) {
            // console.log(newSize)
            this.queryInfo.pagesize = newSize
            this.getUserList()
        },
        // 监听 页码值 改变的事件
        handleCurrentChange(newPage) {
            console.log(newPage)
            this.queryInfo.pagenum = newPage
            this.getUserList()
        },
        //监听 switch 开关状态的改变
        async userStateChanged(userinfo) {
            console.log(userinfo)
            const { data:res } = await this.$http.put(
                `users/${userinfo.id}/state/${userinfo.mg_state}`)// 这里不是引号，是反引号
            if(res.meta.status !== 200) {
                userinfo.mg_state = !userinfo.mg_state //取反
                return this.$message.error('更改用户状态失败！')
            }
            this.$message.success('更新用户状态成功！')
        },
        //监听添加用户对话框的关闭事件
        addDialogClosed() {
            this.$refs.addFormRef.resetFields();
        },
        //点击按钮添加新用户
        addUser() {
            this.$refs.addFormRef.validate(async valid => {
                // console.log(valid)
                if (!valid) return
                //可以发起添加用户的网络请求
                const {data:res} = await this.$http.post('users', this.addForm)
                if (res.meta.status !== 201 ) {
                    this.$message.error('添加用户失败！')
                }
                this.$message.success('添加用户成功！')
                //隐藏添加用户的对话框
                this.addDialogVisible = false
                //刷新，重新获取用户列表数据
                this.getUserList()
            })
        },
        //展示编辑用户的对话框
        async showEditDialog(id) {
            // console.log(id)
            const {data:res} = await this.$http.get('users/' + id)

            if(res.meta.status !== 200) {
                return this.$message.error('查询用户信息失败！')
            }
            this.editForm = res.data
            this.editDialogVisible = true
        },
        // 监听修改用户对话框的关闭事件
        editDialogClosed() {
        this.$refs.editFormRef.resetFields()
        },
        // 修改用户信息并提交
        editUserInfo() {
            this.$refs.editFormrRef.validate(async valid=> {
                // console.log(valid)
                if(!valid) return
                //发起修改用户信息的数据请求
                const {data: res} = await this.$http.put('users/' + this.editForm.id,{
                    email: this.editForm.email,
                    mobile: this.editForm.mobile
                })
                if(res.meta.status !== 200) {
                return this.$message.error('更新用户信息失败！')
                }

                //关闭对话框
                this.editDialogVisible = false
                //刷新数据列表
                this.getUserList()
                //提示修改成功
                this.$message.success('提示更新用户信息成功')
            })
        },
        // 根据Id删除对应的用户信息
        async removeUserById(id) {
            // console.log(id)

            //弹框询问用户是否删除数据
            const confirmResult = await this.$confirm
            ('此操作将永久删除该用户, 是否继续?', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
            }
        ).catch(err => err)

        // 入过用户确认删除，则返回值为字符串 confirm
        // 如果用户取消删除，则返回字符串 cancel
        // console.log(confirmResult)
        if (confirmResult !== 'confirm') {
            return this.$message.info('已取消删除')
        }

        const {data: res} = await this.$http.delete('users/' + id)
        
        if (res.meta.status !==200) {
            return this.$message.error('删除用户失败！')
        }
        
        this.$message.success('删除用户成功！')
        this.getUserList()  //删除成功后刷新用户列表
        },

        // 展示分配角色的对话框
        async setRole(userInfo) {
            this.userInfo =userInfo

            // 在展示对话框之前，获取所有的角色列表
            const {data: res} = await this.$http.get('roles')
            if (res.meta.status !== 200) {
                return this.$message.error('获取角色列表失败！')
                }
            this.rolesList = res.data

            this.setRoleDialogVisible = true
        },

        //点击按钮,分配角色
        async saveRoleInfo() {
            if (!this.selectedRoleId) {
                return this.$message.error('请选择要分配的角色')
            }
            const { data: res } = await this.$http.put(`users/${this.userInfo.id}/role`,
             {
                rid: this.selectedRoleId
             }
            )

            if (res.meta.status !== 200) {
                return this.$message.error('更新角色失败！')
            }

            this.$message.success('更新角色成功！')
            this.getUserList()
            this.setRoleDialogVisible = false
        },
        //监听分配角色对话框的关闭事件
        setRoleDialogClosed() {
            this.selectedRoleId = ''
            this.userInfo = {}
        }

    }
}
</script>

<style lang="less" scoped>
.el-table {
  margin-top: 15px;
}
</style>